Quinn Mallory, while working on an anti-gravity machine, accidentally creates a portal to a parallel universe. Eventually, his friends and an unwilling participant accidentally get stuck traveling among parallel worlds, trying to survive, and learning that sliding can lead to fatal results.

The show follows a crime, ususally adapted from current headlines, from two separate vantage points. The first half of the show concentrates on the investigation of the crime by the police, the second half follows the prosecution of the crime in court.